Abrasion-resistant synthetic upper is water repellent Left and right asymmetrical, non-metallic carbon-fiber toes offer unobtrusive fit and are 15% lighter than steel Luftcell: Air-infused, PU midsole for weightless comfort Electrical hazard (EH) or Electric Shock Resistant (ESR) footwear provides a secondary source of protection in case accidentally coming into contact with live electrical circuits Oil and slip-resistant non-marking rubber outsole